Spindle-bearing



(No Model.)

J. KILBURN.

SPINDLE BEARING.

N0. 306,624. Patented Oct. 14, 1.884;

Nrrn

rates ATENT Fries.

SPlN'DLE-BEARING.

ZIPLCIFICATIQN forming part of Letters Patent No. 306,624, dated October 14, 1884.

Application filed June 25,1883. (N0 model.)

To aZZ whom it may concern.-

Be it known that I, JOHN KILBURN, of Lowell, county of Middle-sex, State of Massachusetts, have invented an Improvement in Spindle-Bearings, of which the following description, in connection with the accompanying drawings, is a specification, like letters 011 the drawings representing like parts.

Spindles and bolsters of the class represented in United States Patent No. 227,129 contain in practice a fibrous packing which incloses and connects the bolster with the footstep, both being located within the chamber in the bolster-case. The fibrous packing worn away more or less rapidly by the friction inside of it of the bolster as the latter is moved with the spindle is liable to be torn and twisted off. To restrain the bolster from rotation with the spindle, and thus obviate wearing the packing, I have provided the upper end of the bolster with one or more projections to enter one or more notches in a collar or cap inserted into the open end of the bolster-case, the said collar or cap being restrained from'rotation therein and preventing the rotation of the bolster in the bolster-ease and with the spindle.

Figure 1 represents in elevation a spindle and step and nut, and in section the sleevewhirl, step-rail, bolster, and other parts located in the bolster-case, the latter being partially in section; Fig. 2, a section of Fig. 1 on the dotted line a: at; Fig. 3, an under side View of the detachable collar; Fig. 4, a side view thereof. Fig. 5 is a top and a vertical side view of the bolster. Fig. 6 is a modification in section, it showing the collar made to serve the purposes of the cap or cover for the bolster-case; Fig. 7, a section of Fig. 6 on the dotted line 3 g as it would appear if in elevation instead of section; Fig. 8, a top view and section of the modified collar or cap. Fig. 9 is a sectional detail of the inner side of a portion of the upper end of the bolster-case to Show the short annular or circumferential groove and the groove intersecting it, and Fig. 10 represents a forked wrench used to turn the collar or cap.

The spindle A, its sleeve-whirl B, bolstercase 0, bobbin D, step-rail E, nut F, fibrous or elastic packing G, and foot-step H are all substantially as in the patent referred to. The bolster a, placed neXt the spindle and surrounded by the elastic packing, is provided at its upper end with two projections, 2, adapted to enter notches 3 cut in a flanged part of the cap or collar 1), adapted to be inserted into the open top of the bolster-case. The bolster-case is provided at its interior with two short grooves, 4, extended from its upper end downward for a short distance, where a substantially-horizontal Slot or groove, 5, is extended from each fora short distance. annularly or circuinferentially within the bolster-case, one of the said horizontal slots being shown in Fig. 9.

The cap or collar 1), near its lower end, has two projections, 6, which may be inserted into the two vertical grooves 4, (see Fig. 9,) made in the bolster case at its upper end. When the said cap is to be inserted into. the upper end of the bolster-case to restrain the bolster from rotation, the projections at the top of the bolster will be placed midway between the vertical grooves in the bolster-case, and the projections 6 on the cap or collar,,as the latter is moved downward in the bolster-case, will direct the collar and insure the entrance of the projections 2 of the bolster into the notches 3 in the flanged part of the cap or collar. The cap or collar having been engaged with the projections of the bolster-case, a small fork (shown in Fig. 10) has its prongs placed in the notches 7 of the cap or collar, and the latter is thereby given a partial rotation, causing the projections 6 thereon to move into the horizontal or annularly-extended grooves 5 of the bolster-case, and the said projections, acting in the grooves 4 and 5, form what is known as a bayonet-joint connection, and prevent the cap from being lifted, so long as the projections rest in the groove. The projections 6 on the cap or collar arriving at the closed end of the groove 5, the cap or collar cannot further turn in that directionnar nely, the direction of rotation of the spindleand consequently the bolster, the projections 2 of which are then extended into the notches of the cap or collar, cannot rotate with the spindle. The notches in the cap or collar are considerably larger in area than the projections on the bolster, so that the bolster is free to move later- IOO ally to a limited extent in every direction as the spindle moves laterally to find its true center of rotation.

In Fig. 8 the notches 3 are shown as formed in a flange nearer the top of the cap or collar than in Figs. 1 and 3, and the bolster-tube is carried up a little higher, as in Fig. 6, so that the projections 2 come high enough to enter the notches 3.

I claim 1. The bolster-case and cap or collar provided with the notches 3, combined with the bolster having one or more projections 2, to enter the said notches, whereby the cap or collar is enabled to restrain the bolster from rotation with the spindle, substantially as described.

JOHN KILBURN.

WVitnesses:

WM. F. DRAIER, Gno. W. GREGORY. 

